VizieR Online Data Catalog: Catalog of dense cores in Aquila from Herschel (Konyves+, 2015)

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2020-04-06T14:43:51Z

Acceptance in OA@INAF

VizieR Online Data Catalog: Catalog of dense cores in Aquila from Herschel

(Konyves+, 2015)

Title

Konyves, V.; Andre, P.; Men'shchikov, A.; Palmeirim, P.; Arzoumanian, D.; et al.

Authors

10.26093/cds/vizier.35840091

DOI

http://hdl.handle.net/20.500.12386/23879

Handle

VizieR Online Data Catalog

Journal

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J/A+A/584/A91 Catalog of dense cores in Aquila from Herschel (Konyves+, 2015)

A census of dense cores in the Aquila cloud complex: SPIRE/PACS observations from the Herschel Gould Belt survey.

Konyves V., Andre P., Men'shchikov A., Palmeirim P., Arzoumanian D., Schneider N., Roy A., Didelon P., Maury A., Shimajiri Y.,

Di Francesco J., Bontemps S., Peretto N., Benedettini M., Bernard J.-P., Elia D., Griffin M.J., Hill T., Kirk J., Ladjelate B., Marsh K., Martin P.G., Motte F., Nguyen Luong Q., Pezzuto S., Roussel H., Rygl K.L.J., Sadavoy S.I., Schisano E., Spinoglio L., Ward-Thompson D., White G.J.

<Astron. Astrophys. 584, A91 (2015)>

=2015A&A...584A..91K (SIMBAD/NED BibCode)

ADC_Keywords: YSOs ; Regional catalog ; Infrared sources ; Interstellar medium ;

Combined data ; Photometry, millimetric/submm

Keywords: ISM: individual objects: Aquila Rift complex - stars: formation -

ISM: clouds - ISM: structure - submillimeter: ISM

Abstract:

We present and discuss the results of the Herschel Gould Belt survey (HGBS) observations in an ∼11deg2 area of the Aquila molecular cloud complex at d∼260pc, imaged with the SPIRE and PACS photometric cameras in parallel mode from 70-micron to 500-micron. Using the multi-scale, multi-wavelength source extraction algorithm getsources, we identify a complete sample of starless dense cores and embedded (Class 0-I) protostars in this region, and analyze their global properties and spatial distributions. We find a total of 651 starless cores, ∼60% ±10% of which are gravitationally bound prestellar cores, and they will likely form stars in the future. We also detect 58 protostellar cores. The core mass function (CMF) derived for the large population of prestellar cores is very similar in shape to the stellar initial mass function (IMF), confirming earlier findings on a much stronger statistical basis and supporting the view that there is a close physical link between the stellar IMF and the prestellar CMF. The global shift in mass scale observed between the CMF and the IMF is consistent with a typical star formation efficiency of ∼40% at the level of an individual core. By comparing the numbers of starless cores in various density bins to the number of young stellar objects (YSOs), we estimate that the lifetime of prestellar cores is ∼1Myr, which is typically ∼4 times longer than the core free-fall time, and that it decreases with average core density. We find a strong correlation between the spatial distribution of prestellar cores and the densest filaments observed in the Aquila complex. About 90% of the Herschel-identified prestellar cores are located above a background column density corresponding to AV∼7, and ∼75% of them lie within

filamentary structures with supercritical masses per unit length ≳16M☉/pc. These findings support a picture wherein the cores

making up the peak of the CMF (and probably responsible for the base of the IMF) result primarily from the gravitational fragmentation of marginally supercritical filaments. Given that filaments appear to dominate the mass budget of dense gas at A_V>7, our findings also suggest that the physics of prestellar core formation within filaments is responsible for a characteristic "efficiency"

SFR/Mdense∼5±2x10-8yr-1 for the star formation process in

dense gas.

Description:

Based on Herschel Gould Belt survey (Andre et al.,

2010A&A...518L.102A) observations of the Aquila cloud complex, and using the multi-scale, multi-wavelength source extraction algorithm getsources (Men'shchikov et al., 2012A&A...542A..81M), we identified a total of 749 dense cores, including 685 starless cores and 64

protostellar cores.

The observed properties of all dense cores are given in tablea1.dat, and their derived properties are listed in tablea2.dat.

File Summary:

FileName Lrecl Records Explanations ReadMe 80 . This file

tablea1.dat 519 749 Observed properties of dense cores in Aquila

tablea2.dat 178 749 Derived properties of dense cores in Aquila

list.dat 100 2 List of fits images fits/* 0 2 Individual fits files

See also:

J/MNRAS/421/3257 : MHO catalogue for Serpens and Aquila (Ioannidis+, 2012)

J/ApJ/723/915 : BLAST view of Aquila SFR (Rivera-Ingraham+, 2013)

Portal

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Byte-by-byte Description of file: tablea1.dat

Bytes Format Units Label Explanations 1- 3 I3 --- Seq Core running number

5- 19 A15 --- Name Core name, HHMMSS.s+DDMMSS, to be added after HGBS_J

21- 22 I2 h RAh Right ascension (J2000) 24- 25 I2 min RAm Right ascension (J2000) 27- 31 F5.2 s RAs Right ascension (J2000) 33 A1 --- DE- Declination sign (J2000) 34- 35 I2 deg DEd Declination (J2000) 37- 38 I2 arcmin DEm Declination (J2000) 40- 43 F4.1 arcsec DEs Declination (J2000)

45- 50 F6.1 --- Signi070 Detection significance at 70um (1)

52- 60 E9.3 Jy Sp070 Peak flux density at 70um (in Jy/beam) 62- 68 E7.2 Jy e_Sp070 Error on peak flux density at 70um (in Jy/beam)

70- 75 F6.2 --- Sp070/Sbg070 Contrast over local background at 70um 77- 85 E9.3 Jy Sconv070 Smoothed peak flux density at 70um (in Jy/beam500) (2)

87- 95 E9.3 Jy Stot070 Integrated flux density at 70um

97-103 E7.2 Jy e_Stot070 Error on integrated flux density at 70um 105-107 I3 arcsec FWHMa070 ?=-1 Major FWHM diameter at 70um (3)

109-111 I3 arcsec FWHMb070 ?=-1 Minor FWHM diameter at 70um (3)

113-115 I3 deg PA070 ?=-1 Position angle at 70um (3)(4)

117-122 F6.1 --- Signi160 Detection significance at 160um (1)

124-132 E9.3 Jy Sp160 Peak flux density at 160um (in Jy/beam) 134-140 E7.2 Jy e_Sp160 Error on peak flux density at 160um (in Jy/beam)

142-147 F6.2 --- Sp160/Sbg160 Contrast over local background at 160um 149-157 E9.3 Jy Sconv160 Smoothed peak flux density at 160um (in Jy/beam500) (2)

159-167 E9.3 Jy Stot160 Integrated flux density at 160um

313-319 E7.2 Jy e_Stot350 Error on integrated flux density at 350um 321-323 I3 arcsec FWHMa350 Major FWHM diameter of core at 350um 325-326 I2 arcsec FWHMb350 Minor FWHM diameter of core at 350um 328-330 I3 deg PA350 Position angle of core at 350um (4)

357-362 F6.2 --- Sp500/Sbg500 Contrast over local background at 500um 364-372 E9.3 Jy Stot500 Integrated flux density at 500um

374-380 E7.2 Jy e_Stot500 Error on integrated flux density at 500um 382-384 I3 arcsec FWHMa500 Major FWHM diameter of core at 500um 386-387 I2 arcsec FWHMb500 Minor FWHM diameter of core at 500um 389-391 I3 deg PA500 Position angle of core at 500um (4)

393-398 F6.1 --- SigniNH2 Detection significance at column density 400-404 E5.1 10+21cm-2 NpH2 Peak H2 column density at 18.2" resolution 406-409 F4.2 --- NpH2/Nbg Contrast over local background at

column density

411-414 E4.1 10+21cm-2 NconvH2 Peak H2 column density at 36.3" resolution 416-419 E4.1 10+21cm-2 NbgH2 Local background H_2 column density 421-423 I3 arcsec FWHMaNH2 Major FWHM diameter of core at N_H2 425-427 I3 arcsec FWHMbNH2 Minor FWHM diameter of core at N_H2 429-431 I3 deg PANH2 Position angle of core at N_H2 (4)

433 I1 --- NSED [1/5] Number of significant Herschel bands 435 A1 --- CSARflag [012] Associations with CSAR-found cores (5)

437-448 A12 --- Coretype Core type (6)

450-482 A33 --- NSIMBAD Closest counterpart found in SIMBAD 484-505 A22 --- NSPITZER Closest SPITZER c2d association (7)

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Note (1): Detection significance, derived by getsources (Men'shchikov et al.,

2012A&A...542A..81M), is 0.0 if the core is not visible in clean single scales.

Note (2): Peak flux density at the specified wavelength, measured after

smoothing the data to a 36.3" beam.

Note (3): A special value of -1 is given when no size measurement was possible. Note (4): Position angle of the core major axis, measured east of north. Note (5): CSAR-flag: 2 if the getsources core has a counterpart detected by CSAR

(Kirk, J.M. et al., 2013MNRAS.432.1424K) within 6 arcsec of its peak position, 1 if no close CSAR counterpart was found but the peak position of a CSAR source lies within the FWHM contour of the getsources core in the high-resolution column density map, 0 otherwise.

Note (6): Core type: starless, prestellar, protostellar.

Note (7): Closest Spitzer-identified YSO from the c2d survey (Dunham et al.,

2013AJ....145...94D, Allen et al., in prep.) within 6-arcsec of the Herschel peak position, if any.

Byte-by-byte Description of file: tablea2.dat

Bytes Format Units Label Explanations 1- 3 I3 --- Seq Core running number 5- 19 A15 --- Name Core name, HHMMSS.s+DDMMSS, to be added after HGBS_J* 21- 22 I2 h RAh Right ascension (J2000) 24- 25 I2 min RAm Right ascension (J2000) 27- 31 F5.2 s RAs Right ascension (J2000) 33 A1 --- DE- Declination sign (J2000) 34- 35 I2 deg DEd Declination (J2000) 37- 38 I2 arcmin DEm Declination (J2000) 40- 43 F4.1 arcsec DEs Declination (J2000) 45- 51 E7.2 pc Rd Deconvolved core radius (1)

53- 59 E7.2 pc Robs Observed core radius (2)

61- 65 F5.2 Msun Mcore Estimated core mass

67- 70 F4.2 Msun e_Mcore Uncertainty in the core mass 72- 75 F4.1 K Tdust Dust temperature from SED fitting 77- 79 F3.1 K e_Tdust Uncertainty in the dust temperature 81- 85 F5.1 10+21cm-2 NH2peak Peak H2 column density at 36.3" resolution 87- 91 F5.1 10+21cm-2 NH2av Average NH2 derived with Robs

93- 97 F5.1 10+21cm-2 NH2avd Average N_H2 derived with Rd 99-103 F5.1 10+4cm-3 nH2peak Beam-averaged peak volume density 105-109 F5.1 10+4cm-3 nH2av Average core volume density from Robs 111-115 F5.1 10+4cm-3 nH2avd Average volume density from Rd 117-120 F4.1 --- alphaBE Bonnor-Ebert mass ratio 122-133 A12 --- Coretype Core type (3)

135-178 A44 --- Com Comments (4)

Note (1): Geometrical average between the major and minor FWHM sizes of the core

[pc], measured in the high-resolution column density map after deconvolution from the 18.2-arcsec HPBW resolution of the map.

Note (2): Same as (1) before deconvolution.

Note (3): Core type: starless, prestellar, protostellar.

Note (4): Comments may be "no SED fit", "tentative bound", or "CO high-V_LSR",

see Sect. 4 of the paper for details.

Byte-by-byte Description of file: list.dat

Bytes Format Units Label Explanations

1- 9 F9.5 deg RAdeg Right ascension of image center (J2000) 10- 18 F9.5 deg DEdeg Declination of image center (J2000) 20 I1 arcsec/pix Scale [3] Scale of the image

22- 25 I4 --- Nx [5233] Number of pixels along X-axis 27- 30 I4 --- Ny [5657] Number of pixels along Y-axis 32- 37 I6 Kibyte size [115642] Size of the fits file

39- 77 A39 --- FileName Name of the fits file in subdirectory fits 79-100 A22 --- Title Title of the fits file

Acknowledgements:

Vera Konyves, vera.konyves(at)cea.fr Philippe Andre, pandre(at)cea.fr

References:

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Kirk, J.M. et al., 2013MNRAS.432.1424K

Men'shchikov et al., 2012A&A...542A..81M

(End) Vera Konyves [CEA/Saclay, France], Patricia Vannier [CDS] 29-Jul-2015

The document above follows the rules of the Standard Description for Astronomical Catalogues; from this documentation it is possible to generate f77 program to load files into arrays or line by line